· Bakelite powder is a thermosetting plastic, which undergoes a polymerization reaction when heated during the injection molding process. Through the action of a cross-linking agent (or called a bridging agent), chemical cross-links are generated between molecular chains to form a tight network-like structure. Therefore, it is a class-like polymer.

·The cross-linking reaction is to react the linear polymer into a network-like polymer. The polymer after the cross-linking reaction will probably have the following characteristics:

• (1) Reduced elasticity

  (2) Increased hardness

  (3) Loss of thermoplasticity, that is, becoming a thermosetting polymer

  (4) Not easy to decompose

  

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